Echo 1 - A-10 Echo Echo X - NASA's first experiment in the field of satellite telecommunications. American łącznościowy passive satellite. Metallic balloon with a diameter of 30 m, which was reflected radio signals. Launched May 13, 1960 (09:16:05 GMT) Thor Delta rocket from Space Flight Center John F. Kennedy 'ego. Echo 1 did not reach orbit due to malfunction 2 section of the rocket. Planned for the mission made a similar balloon Echo 1A. Although the idea of a passive communications satellite was abandoned, a series of experiments with balloons Ech